eSIM Provisioning on MC7421

IoT Modules MC/EM Series
1

Hello everyone,

We are encountering difficulties with registering and provisioning an eSIM from an MNO of our choice using the MC7421 module.

Is it possible to use our own eSIM with the MC7421, or is this functionality not supported by this module? If the MC7421 does not support it, are there any Sierra Wireless modules that do allow the use of our own eSIM?

Additionally, if anyone has documentation or guidance on how to install an eSIM profile on the MC7421 or any other Sierra Wireless module, it would be greatly appreciated.

Thank you for your assistance!

BR Mansour

2

do you try to solder your eSIM to the UIM1 or UIM2 interface?

3

This model comes with eUICC support. Where should I solder something?

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4

If you are talking about internal esim, i think It depends on SKU you have ordered

5

Where can I find the SKU number?

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image960×1280 154 KB

6

I guess it is 1104688, but seems there is no internal eSIM inside the module

7

I couldn’t find any information indicating that an eSIM still needs to be soldered onto it. I had thought it was already included. Could you please recommend a LTE module with mPCIe that already has an internal eSIM built-in?

8

Didn’t it say eUICC management on external sim?

Did you check with digi key?

Did you check at+cpin? After switching sim slot by at!uims?

9

How does external SIM work on the MC7421?

Digi Key does not display which modules have an already built-in oboard eSIM.

This is the result of AT+CPIN:

image

10

Okay, I think I found some LTE modules which have onboard eSIM. Seems like the MC series does not have onboard eSIMs.

These are some modules I found, which do have onboard eSIM:
EM7690
EM7590
EM7595

11

Suggest you asking the distributor before ordering

12

Seconding the original question. I got an EM7421 module which is expected to have an internal eUICC on the second slot. It appears in Linux as a modem, but naturally - the SIM is “not inserted”. How can I provision the eSIM purchased from the operator?

13

What is the return of the followings?

At!uims?
Ati3
At!entercnd=“A710”
At!sku?

14

At!uims?
!UIMS: 0

OK
Ati3
Manufacturer: Sierra Wireless, Incorporated
Model: EM7421
Revision: SWI9X50C_01.14.22.00 ba8ef1 jenkins 2022/11/11 09:59:48
IMEI: 356281110751514
IMEI SV: 15
FSN: 8G3455760401B1
+GCAP: +CGSM,+DS,+ES

OK
AT!entercnd=“A710”
OK
AT!sku?
SKU: 1104681

OK

15

You are still using the 1st sim slot

16

I do, but with the second it shows pretty much the same. The modem is new, just got it from the reseller (not the cellular operator) and it does not have any SIM provisioned. What I am looking for - is a guide, how to take the QR code or any other definition of a purchased non-physical SIM - and “burn” it into this modem.
Thanks

17

I don’t think the SKU 1104681 is having internal eSIM chipset

18

Could you check?
On SW own site - https://www.sierrawireless.com/iot-modules/4g-modules/em7421/ the specification reads “EMBEDDED SIM Consumer and M2M eUICC” - which is misleading.

19

maybe it depends on the SKU number
do you check with the distributor or sales team?

20

The consumer eSIM only for EM76xx, EM91xx, and EM92xx with SKU depends.
The EM7411, based on a 9x50 chipset, was designed before eUICC SGP.22 standards were popular.
Might have SKU but with Semtech connectivity.
Anyway, please contact your local distributor to get the relevant SKU, etc.